code: def isqrt_python(x):
      """Integer square root with correct (floor) rounding."""
      return sqrtrem_python(x)[0]
  
imports: import math
  from bisect import bisect
  from .backend import xrange
  from .backend import BACKEND, gmpy, sage, sage_utils, MPZ, MPZ_ONE, MPZ_ZERO
label_desc: Use image node_id 15 for calling a global function with example usage: isqrt_python(x) and returns: sqrtrem_python